Quoth Rookwise:I take it he was a Vehicon. What was the characters role ? Or is it one that has yet to be explained ?

He was used in the Wreckers comics as your typical Vehicon general. Megatron claimed Blastcharge once served under the original Megatron. Arcee rather brutally eviscerated him in the end of the only comic he appeared in.

Looks like they mis-transformed the robot mode. The missile launchers are supposed to form his chest, not some goofy backpiece.